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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bf9bed96b2ad8e69c0db47715450d95fa9f5a85cd8a5e99e775222142e865d7' 
  AND token = 'AUcd40MjXmPHnqzE4b+IbM+qDFBj0cLZtgcwpQaKZ7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}